linux/arch/arm/mach-spear/spear3xx.c
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   1/*
   2 * arch/arm/mach-spear3xx/spear3xx.c
   3 *
   4 * SPEAr3XX machines common source file
   5 *
   6 * Copyright (C) 2009-2012 ST Microelectronics
   7 * Viresh Kumar <vireshk@kernel.org>
   8 *
   9 * This file is licensed under the terms of the GNU General Public
  10 * License version 2. This program is licensed "as is" without any
  11 * warranty of any kind, whether express or implied.
  12 */
  13
  14#define pr_fmt(fmt) "SPEAr3xx: " fmt
  15
  16#include <linux/amba/pl022.h>
  17#include <linux/amba/pl080.h>
  18#include <linux/clk.h>
  19#include <linux/io.h>
  20#include <asm/mach/map.h>
  21#include "pl080.h"
  22#include "generic.h"
  23#include <mach/spear.h>
  24#include <mach/misc_regs.h>
  25
  26/* ssp device registration */
  27struct pl022_ssp_controller pl022_plat_data = {
  28        .bus_id = 0,
  29        .enable_dma = 1,
  30        .dma_filter = pl08x_filter_id,
  31        .dma_tx_param = "ssp0_tx",
  32        .dma_rx_param = "ssp0_rx",
  33};
  34
  35/* dmac device registration */
  36struct pl08x_platform_data pl080_plat_data = {
  37        .memcpy_burst_size = PL08X_BURST_SZ_16,
  38        .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
  39        .memcpy_prot_buff = true,
  40        .memcpy_prot_cache = true,
  41        .lli_buses = PL08X_AHB1,
  42        .mem_buses = PL08X_AHB1,
  43        .get_xfer_signal = pl080_get_signal,
  44        .put_xfer_signal = pl080_put_signal,
  45};
  46
  47/*
  48 * Following will create 16MB static virtual/physical mappings
  49 * PHYSICAL             VIRTUAL
  50 * 0xD0000000           0xFD000000
  51 * 0xFC000000           0xFC000000
  52 */
  53struct map_desc spear3xx_io_desc[] __initdata = {
  54        {
  55                .virtual        = (unsigned long)VA_SPEAR_ICM1_2_BASE,
  56                .pfn            = __phys_to_pfn(SPEAR_ICM1_2_BASE),
  57                .length         = SZ_16M,
  58                .type           = MT_DEVICE
  59        }, {
  60                .virtual        = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
  61                .pfn            = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
  62                .length         = SZ_16M,
  63                .type           = MT_DEVICE
  64        },
  65};
  66
  67/* This will create static memory mapping for selected devices */
  68void __init spear3xx_map_io(void)
  69{
  70        iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
  71}
  72
  73void __init spear3xx_timer_init(void)
  74{
  75        char pclk_name[] = "pll3_clk";
  76        struct clk *gpt_clk, *pclk;
  77
  78        spear3xx_clk_init(MISC_BASE, VA_SPEAR320_SOC_CONFIG_BASE);
  79
  80        /* get the system timer clock */
  81        gpt_clk = clk_get_sys("gpt0", NULL);
  82        if (IS_ERR(gpt_clk)) {
  83                pr_err("%s:couldn't get clk for gpt\n", __func__);
  84                BUG();
  85        }
  86
  87        /* get the suitable parent clock for timer*/
  88        pclk = clk_get(NULL, pclk_name);
  89        if (IS_ERR(pclk)) {
  90                pr_err("%s:couldn't get %s as parent for gpt\n",
  91                                __func__, pclk_name);
  92                BUG();
  93        }
  94
  95        clk_set_parent(gpt_clk, pclk);
  96        clk_put(gpt_clk);
  97        clk_put(pclk);
  98
  99        spear_setup_of_timer();
 100}
 101